Built to VMEbus Specification Rev. C.1 (ANSI/IEEE STD 1014-1987, IEC 821 and 297), the Abaco Systems VMIVME-1128-001 delivers 128-channel high-voltage digital input monitoring in a double Eurocard 6U form factor. This VME module handles voltage sources and current sinking signals across a 1.25 to 66 VDC range with user-selectable input thresholds from 0.61 to 34 V.

## Technical Specifications

• Input channels: 128 digital inputs
• Voltage range: 1.25 to 66 VDC
• Input thresholds: 0.61 to 34 V (user-selectable, source-dependent)
• VME address decoding: A24:A16:D32/D16/D08 (EO): Slave: 39/3D:29/2D
• Data transfer widths: 8, 16, 32-bit
• Form factor: Double Eurocard (6U)
• I/O connectors: High-reliability DIN-type
• Open circuit logic: Selectable logic zero or logic one (jumper-configurable)
• Built-in test: Hardware-based fault detection and isolation logic
• Interface: Buffered front-end I/O
• Status indication: Front panel fail LED

## Key Features

Eight-input groups with jumper-selectable configuration enable field customization without software changes. On-board BIT logic provides continuous fault monitoring, reducing unscheduled downtime in mission-critical applications. Buffered inputs protect against electrical transients while maintaining signal integrity. The wide 66 VDC voltage range eliminates the need for external signal conditioning in most industrial control applications. High-reliability DIN connectors ensure consistent connections in high-vibration environments.

## Typical Applications

Industrial automation systems requiring MIL-STD-1553 compliance monitoring. Nuclear power plant safety systems meeting IEEE 603 nuclear safety standards. Railway signaling equipment conforming to EN 50129 safety integrity requirements. Process control systems in petrochemical facilities requiring IEC 61511 functional safety compliance. Military vehicle diagnostic systems operating under MIL-STD-461 EMI requirements.

## Compatibility & Integration

Integrates with Abaco VME-90xx series Intelligent I/O Controllers and VME-9300 series Universal I/O Controllers. VMIVME/SW-9390 Universal I/O Driver provides software interface for system integration. VME P1 connector provides standard backplane connectivity for data and control signals. Double-width design fits standard 19-inch VME chassis with appropriate slot spacing.